Jobs in the United States

25+ jobs

Save this search

Added 1 min ago
RS
Senior Mechanical Designer, Field Service Technician
Retech Systems LLC
Buffalo, NY
- $30 to $43 USD / hour
Added 1 min ago
AI Research Scientist/ Research Engineer: Materials Discovery
Logical Intelligence
San Francisco, CA
Added 2 mins ago
Pre-Sales Solutions Engineer-Hyperscaler
Cisco
San Jose, CA
Added 5 mins ago
Software Systems Engineer - HP IQ
HP
San Francisco, CA
HP IQ’s System Software team enables on-device experiences to take full advantage of our hardware capabilities. We collaborate with internal and external partners in a high-leverage…
Added 5 mins ago
PI
Staff Machine Learning Engineer
PayPal, Inc.
San Jose, CA
- $196,500 to $291,500 USD / year
Added 6 mins ago
T
Storage Engineer
TEKsystems
San Diego, CA
- $65 to $80 USD / hour
DescriptionClient is seeking a hands-on Storage Engineer to design, integrate, validate, and support enterprise storage solutions for Data platforms. The role spans storage hardware,…
Added 6 mins ago
IC
EDA Tools Software Engineer
Intel Corporation
AZ · CA
- $128,880 to $245,160 USD / year
Added 12 mins ago
Assistant Project Manager
Sabre Commercial
Austin, TX
Sabre Commercial is seeking a Assistant Project Manager (AKA Project Engineer) to join our team in the Austin Office.
Added 12 mins ago
Project Manager
Sabre Commercial
Austin, TX
Added 13 mins ago
Software Dev Engineer
Amazon.com Services LLC
Sunnyvale, CA
Added 13 mins ago
Turbine Engine Engineer
Avion Solutions
Huntsville, AL
Avion Solutions Inc., a 100% employee-owned company, seeks candidates for a Turbine Engine Engineer to support Maneuver Air Directorate. This position is based in Huntsville, AL.
Added 13 mins ago
Systems Engineer/MBSE
Avion Solutions
Huntsville, AL
Avion Solutions Inc., a 100% employee-owned company, is seeking candidates for a Systems Engineer/MBSE to support an Army Aviation Capability Program Executive (CPE). This position is…
Added 13 mins ago
Software Test Engineer
Avion Solutions
Huntsville, AL
Avion Solutions Inc., a 100% employee-owned company, seeks candidates for a Software Test Engineer to support the Army Aviation Capability Program Executive (CPE). This position is based in…
Added 13 mins ago
Software Engineer
Avion Solutions
Huntsville, AL
Avion Solutions Inc., a 100% employee-owned company, is seeking candidates for a Software Engineer – HPC and Data Applications to support the development of aircraft data-analysis…
Added 13 mins ago
Range Safety & Flight Termination Engineer
Avion Solutions
Huntsville, AL
Avion Solutions Inc., a 100% employee-owned company, is seeking candidates for a Range Safety & Flight Termination Engineer to support the Missile Defense Agency. This position is located…
Added 13 mins ago
Propulsion Engineer - Environment Control Systems
Avion Solutions
Huntsville, AL
Avion Solutions Inc., a 100% employee-owned company, is seeking candidates for a Propulsion Engineer to support the Propulsion Division, MAD. This position is located in Huntsville, AL.
Added 13 mins ago
Senior Test Systems Engineer – LabVIEW / HMI / Data Acquisition
Vidac Solutions
Fenton, MO
Our projects combine mechanical, electrical, controls, instrumentation, and software engineering to solve unique customer problems. As a smaller engineering company, our team members have…
Added 13 mins ago
Controls Engineer (LabVIEW Specialist)
Vidac Solutions
Fenton, MO
Added 13 mins ago
Senior Test Systems Engineer – LabVIEW / HMI / Data Acquisition
Priority Talent Partners
Fenton, MO
Our projects combine mechanical, electrical, controls, instrumentation, and software engineering to solve unique customer problems. As a smaller engineering company, our team members have…
Added 13 mins ago
Controls Engineer (LabVIEW Specialist)
Priority Talent Partners
Fenton, MO
Added 13 mins ago
Electrical Engineer – Arc Flash Studies
PowerTec Distribution & Motor Control Corporation
Tucson, AZ
We are seeking a motivated and experienced Electrical Engineer – Arc Flash Studies to join our manufacturing team in Arizona.
Added 13 mins ago
C
Applications Engineer
CJWinter
Rochester, NY
- $75,000 to $105,000 USD / year
Applications Engineer - Thread Rolling Solutions Team
Added 13 mins ago
Project Engineer
Apex Companies
Oak Brook, IL
Added 13 mins ago
Project Engineer
Apex Companies
Charlotte, NC
Added 13 mins ago
Project Engineer
GELOCK
Grand Rapids, MI
…employees and into our peak season, we're seeking a Project Engineer to join our growing team! We're a fun company…

SpaceXSI

Sr. Software Engineer, Network (C++)

Palo Alto, CA, United States
Seattle, WA, United States

$200,000 - $375,000 USD

Apply About employer

Applications open in a new tab.

Job details

Pay: $200,000 - $375,000 USD
Experience: 5+ years of professional software development experience in lieu of a degree
Posting language: English
Posted: Nov 4, 2026

Original job description

SpaceX was founded under the belief that a future where humanity is out exploring the stars is fundamentally more exciting than one where we are not. Today, SpaceX is actively developing the technologies to make this possible, with the ultimate goal of making life multiplanetary and expanding consciousness to the stars.

SpaceXSI is building Super Intelligence to help humanity understand the universe. Our teams are building the full Super Intelligence stack: from our Colossus supercomputers, to Grok models, to our suite of applications, including Grok Bot, Grok Build, Grok Imagine, Grok Voice, and X. We're creating a powerful flywheel where more compute trains better models, better models power more useful products, and what we learn from people using those products shapes what we build next.

SR. SOFTWARE ENGINEER, NETWORK (C++)

At SpaceXSI, we design, build, and operate Colossus from the ground up. This includes the massive GPU clusters, high-speed interconnect fabric, and the software that makes it all work at unprecedented scale. Colossus powers Grok and our frontier AI models with a custom, high-performance datacenter network that delivers ultra-low latency and massive bandwidth across hundreds of thousands of GPUs.

As a Software Engineer on the Colossus Networking team, you will develop the core networking software that maximizes the performance and reliability of our datacenter fabric. Your work will directly impact training efficiency, model convergence, and the speed at which we can push the frontier of AI.

Our engineers own the full lifecycle of their software - from design and implementation to deployment, monitoring, and iteration based on real-world performance at scale. You will solve hard problems in distributed systems, high-performance networking, and real-time control of one of the largest AI supercomputers on Earth.

RESPONSIBILITIES:

Develop routing and traffic-engineering algorithms for the Colossus high-performance datacenter network
Develop highly reliable, real-time software designed to run on the switches that form the backbone of our low-latency, high-bandwidth AI training fabric
Participate in and lead architecture, design, and code reviews
Develop prototypes and run experiments to validate key design decisions at both small and full-cluster scale
Build tools for software development, deployment, data analysis, visualization, and testing across virtualized environments, hardware-in-the-loop setups, and live production clusters
Deploy reliable software updates through continuous integration and release systems with rigorous testing and monitoring

BASIC QUALIFICATIONS:

Bachelor’s degree in computer science, engineering, math, or technical discipline
5+ years of professional software development experience in lieu of a degree
Development experience in C or C++

PREFERRED SKILLS AND EXPERIENCE:

Strong professional experience writing high-performance C/C++ in production environments
Experience developing, debugging, and deploying software that runs at scale in real-world systems
Deep knowledge of networking protocols (UDP, TCP/IP, RDMA, etc.), distributed systems, and large-scale datacenter fabrics
Background in real-time systems, high-performance computing, low-latency networking, or resource-constrained environments
Creative problem-solving ability with exceptional analytical skills and strong engineering fundamentals
Excellent written and verbal communication skills
Ability to thrive in a fast-paced, dynamic environment with evolving requirements
Experience with security considerations in large-scale distributed systems

COMPENSATION AND BENEFITS:

$200,000 - $375,000 USD

Base salary is just one part of our total rewards package at SpaceXSI, which also includes equity, comprehensive medical, vision, and dental coverage, access to a 401(k) retirement plan, short & long-term disability insurance, life insurance, and various other discounts and perks. SpaceXSI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice.

Apply About employer

More about this job

Skills

C++
Traffic engineering
Design prototypes
Software development
Data analysis
CI/CD
BASIC
Computer science
C
Debugging
Problem solving
Analytical skills
Communication skills

Report this job